Multipath Routing Using Distributed Proxy Servers

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Multipath Routing Using Distributed Proxy Servers

• Brett Wilson

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Problem

• Modern Applications utilize single TCP
  connections to transfer data
• Single connections could be subject to
  bottlenecks that severely limit available
  bandwidth
• Multipath routing has been proposed to increase
  aggregate data rate by providing multiple routes
  around bottlenecks

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How to Implement Multipath Routing?

• Many Implementation Options
• Network layer
• Routers direct TCP packets across different
  routes
• Transport and Application layer
• Host application uses modifications to transport
  layer to route packets across multiple distinct
  connections
• Using Proxy Servers
• Develop proxy server software to intercept
  outgoing packets and distribute them across
  different routes

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MP Routing Using Proxy Servers
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MP Routing System Design

• MP proxy software responsible for
• Support of SOCKSv5 clients
• Setup of multiple paths through other MP proxy
  servers as requested
• Distribution of client data across the multiple
  paths
• Receipt and sequential re-assembly of incoming
  data from multiple paths and forwarding to client
  application

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Multipath Protocol (MPP)

• Development of a new protocol required to
  facilitate communication between the multipath
  proxy servers on the network
• Protocol must provide
• Coordination of MP connection setup and
  termination
• Guaranteed, sequential delivery of the data

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References

• RFC 1928 describing the SOCKSv5 protocol can be
  found at http//www.rfc-editor.org/
• Nelakuditi, Srihari Zhang, Zhi-Li. On Selection
  of Paths For Multipath Routing, Department of
  Computer Science, University of Minnesota
• Johnny Chen. New Approaches to Routing for
  Large-Scale Data Networks, A Thesis, Rice
  University, June 1999